[smogo]

for a start, you may want to use the following SQL queries :

delete from merchantlist using merchantlist, items where merchantlist.item=items.id  and items.cost > 100000;

will remove all entries in merchant list where item cost is above 100000

and

delete from merchantlist using merchantlist, items where merchantlist.item=items.id  and items.name like '%Paineel%';

will get you rid of entries in merchant list where name contains Paineel.

i hope this can save you time